In Nordic folklore trolls are described as beings who live in isolated areas of rocks, mountains, caves, or under bridges, who are rarely helpful to we humans.
In our modern world, a troll is described as someone who harasses, criticizes, or antagonizes people by making disparaging or mocking statements on social media platforms. Provocateurs exist on all social media platforms, and in other places as well, but one of the platforms that is sometimes seen as the haven for trolls is Twitter, which not long ago was purchased by eccentric billionaire Elon Musk.